From 014fc66da14634715fd5a8cccbbb9513fab5df10 Mon Sep 17 00:00:00 2001
From: Hiago Silva <97215740+Huntterxx@users.noreply.github.com>
Date: Mon, 16 Mar 2026 08:47:37 -0300
Subject: [PATCH] test(tts): add test for missing channel fail-fast

Covers the new no_channel early return when TTS tool is called
without a bound delivery channel.

Part of #43483
---
 src/agents/tools/tts-tool.test.ts | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/agents/tools/tts-tool.test.ts b/src/agents/tools/tts-tool.test.ts
index fe9a6c1def9..93b0083bcf6 100644
--- a/src/agents/tools/tts-tool.test.ts
+++ b/src/agents/tools/tts-tool.test.ts
@@ -9,8 +9,14 @@ const { createTtsTool } = await import("./tts-tool.js");
 describe("createTtsTool", () => {
   it("uses SILENT_REPLY_TOKEN in guidance text", () => {
     const tool = createTtsTool();
-
     expect(tool.description).toContain("QUIET_TOKEN");
     expect(tool.description).not.toContain("NO_REPLY");
   });
+
+  it("returns error when no delivery channel is available", async () => {
+    const tool = createTtsTool();
+    const result = await tool.execute("test-call", { text: "hello world" });
+    expect(result.content[0].text).toContain("requires a bound channel");
+    expect(result.details.error).toBe("no_channel");
+  });
 });